Saw sharpener



W. H. KRAMER 'March 11 1924.

SAW SHARPENER Filed June 3, 1922 2 Sheets-Sheet 2 allumag- Patented Mar.l, 1924.

PATEN WILLIAM H. KRAMER, OF EDINBURG, INDIANA; EMMA KRAMERADMINISTRATRIX OF SAID WILLIAM H. KRAMER, DECEASED.

SAW SHARPENER.

Application filed .Tune 3,

To f/Z wlw/n it may conoer'n.:

Be it known that l, lViLLmM H. KRAMER, a citizen of the United States,residing at Edinburg, in the county of Johnson and State of Indiana,have invented a new and useful Saw Sharpener, of which the following isa specification.

My invention relates to improvements in saw sh'. pening devices and,while being operable for sharpening various types of saws, isparticularly applicable for sharpening hand saws.

One of the objects of my invention is to provide a saw sharpening devicefor band saws which is arranged so that a plurality uit teeth on a bandsaw may be sharpened at the same time by a single sharpening instrument.Other objects and advantages of my invention will appear more fully inthtl accompanying specification and claims.

ln the embodin'ient illust 'atedz Fig. 1 is a perspective view of a sawsharpener embodying my invention as used for sharpening band saws;

Fig. 2 is a plan view of the structure illus-v trated in Fig. 1;

Fig. 3 a sectional view taken on the line 3-3 of Fig.

Fig. l is a plan view of the structure when employed for sharpening disksaws; and

Fig. 5 is a sectional view taken on the line 55 of Fig. si..

ln the. embodiment illustrated I provide a base 1 which is preferablytriangular although this is not essential and at its rear end isprovided with an upright support 2 having a plurality of forwardlyextending pins 3 on which the free portion of the band saw is adapted torest. This base 1 at its forward end supports a platform 4l having atransversely extending guide rail 5 and a slide rail. G. Slidablymounted upon the platform d and guided by the guide rail 5 is a carriage7 which is reciprocated by means of a pinion 8 rotatably mountedvon thecarriage and having an operating handle l). This pinion engages a rack10 mounted ou the slide rail 6.

Mounted upon the transversely reciprorated carriage 7 is the tool holderfor sharpeuing the saw. This holder comprises a relatively stationaryslide rail 11 mounted on a base 12 which is pivotally secured at 13 tothe carriage T. -it the forward end'of the hase there is provided anarcuate slot 11i 1922. serial No. 565,512.

in which operates a pin 15 mounted on the carriage 7. A wing nut 16threaded on the pin clamps the rail 11 in any position to which it maybe moved. Reciprocably mounted on the rail 11 is the movable member ofthe tool holder which member comprises a tool receiver 17 slotted on itsunder face to tit and slide on the rail 11 and provided with a pistolgrip handle 18. EX- tending laterally from one side of the receiver 17is a pair f lugs 19 and 20. The lug 20 carries an adjustable rod 21 heldin its adjusted position by a set screw 22, the forward end of the rodbeing adapted to receive one end of the saw :tile 23. The opposite ,endof the file is soeketed in the lug 19 and held in clamped positionbetween the end of the rod 21 and a set screw 2d. The saw to be tiled isheld in tiling position in a vise beneath the tile 23. One jaw 25 ofthis vise is stationary and is preferably mounted on the support 4. Theopposite jaw 26 is pivoted at 27' and is provided with a oam surface 28.This jaw is mounted upon a cross arm 29 and the cam surface of this jawis arranged to be engaged by a roller 30 mounted upon a pin 31 extendingthrough a slot 32 in the base 12. A clamping wing nut 33 holds the pinin any adjusted position. The stationary vise jaw 25 is preferablyelongated and extends downwardly being slotted as at 34 to receive a pin85 on an adjustable anvil 36. This anvil is grooved to fit over thedownwardly extending portion of the jaw 25 and is guided thereby.Suitable nuts 37 and 38 are mounted on the pin for clamping the anvil inits adjusted position.

The carriage 7 and the parts supported thereby are removably mounted onthe base et and in sharpening a band saw this carriage is lirst removedto permit the saw to be placed in position. The saw 39 is folded uponitself to form three loops and is placed in position upon the base withthe teeth all extending upwardly. In looping the saw for the purpose ofplacing it in the position the saw is elongated with more or lesselliptical shape. The two elongated sides are drawn together and causedto overlap at two points forming at each end two sub-l stantiallycircular loops and in the center a third suhstmtially circular loop. Thetwo end circular loops are then doubled under so that the saw assumes afinal position comiane Y upon prising three substantially circular loopsas shown in Fig. l of the drawing. To loop this saw as above theoperator grips the saiv at opposite points, a distance from one bight,turns the upper edges of the saw inward, raising the hands with the farbight resting the floor, then swings the hands together passing one sideof the saw beneath the other continuing the twisting action upon theblade, then swings the bight which initially rested against the bodyforwardly beneath the crossed portions of the blade.

The free portion of the looped sau' rests upon the pins 3 and the otherportion is arranged betiveenthe vise jaws and 2G. the folds being guidedand positioned by means of the guide pins al). After the saiv is placedin position the arriage and as sociated parts are placed in position onthe base above the. saw with the file engaging the teeth of the saw.Care should be taken to arrange the aligned teeth of the three loopsset. in the same direction. lith the parts in the above describedassembled position the handle S) is manipulated to move the file 23 tothe right, lookingat Fig. .1. Due to the fact that the sliding member 1Thas merely a groove and slot connection with the rail ll the slidingmember maybe slight ly raised to permit the tile 23 to clear the teethon its backward movement. After the lile has been moved sutlieiently farbark it is lowered into engagement with one set of the teeth and thehandle 9 manipulated to advance or move the carriage to thevleft.,vvie\ving the structure as shown in Fig. l. The tile 23 is thusmoved into engagement with the teeth and at the same time the threeloops of the saw are advanced one step, the roller 2%() engaging thecani face 2S of the vvise member 2G and forcing the vise member'intoengagement with the saw blade to securely clamp the three folds of theblade in position. rlhe tile may then be moved 'back and forth tosharpen the three teeth 'which are in alignment. after which the handle9 may be operated to move the file back. the operator lifting the lileat the same time and the file then lowered into engagement with the nextset of three teeth and by' manipulating the handle 5) these are advancedby the file and gripped in the Y for a. tiling of these teeth. Thisoperation is continued until all of the teeth of theI saw are sharpened.

In Fig. 4; I have illustrated the structure used for sharpening theteeth of a rotary or disk Saiv. `illlien.iisin r the structure in Ithisrelation the anvil 36 is lowered and the disksaiv ill secured on thefront end of the pin 35. being held in locked position by the nut P38.The anvil member 36 is lowered sutliciently Yto bring the upper teethofthe saw in proper alignment with the tile Q l the 'anvil is thenlocked in its adjusted position by the nut 37. The manipulation of thecarriage 7 and tile 23 is the same as above described with the exceptionthat as the lile is moved forward one step it rotates the savv on the.pivot pin In a` disk saw the alternate teeth are cut at differentangles. Therefore in operating on the disk saw the base l2 is swung onits pivot 13 to the angle desired, being guided by the slot 14 and pinl5. The setscreiv lo holds the base in its angular position and inreciprocating` the carriage T it is moved so as to advance the saw bladetwo teeth at a time so that each alternate tooth will be cut with thefile at the angle illustrated in Fig. et. After this set of teeth havebeen out the base 12 may be swung in the opposite direction until theangle has been changed to cut the remaining teeth at the proper angleand the carriage and tile manipulated to sharpen the remaining teeth.

l claimv as my invention:

l.. In a'saw Sharpener, the combination with meansfor holding at onepoint a plurality of sections of an -endless band saw. one behind theotheryivith the teeth of said sections in alignment, of a cutting toolarranged to engage and sharpen said aligned teeth.

2. VIn a saw sharpener. the combination with means for supporting a.band saw formed into a plurality of loops and gripping said loops tohold sections of the loops in position. one behind the other. with theteeth in aliginnent, of a cuttino' tool arranged to engage and sharpenfll of said aligned teeth during one cutting operation.

8. ln a saw sharpener. the combination with means for Vholding a bandsaw arranged in loop formation. with the portions of the loops supportedto permit the loops to move Wit-hout interference with one another.means for gripping said loops at one point to hold them one behind theothell with their teeth in alignment, and a cutting tool arranged toengage the aligned teeth and sharpen the same.

Ll. In a` saw sharpener. theV combination with means forv holding anendless band saiv arranged in a plurality of substantially circularloops. means fo-r gripping saidloops at one point to hold the samerigidly and one behind the other with the teeth in alignment` and acutting tool arranged to engage the aligned teeth and sharpen the same.said loops being rotatable in use to permit the presentation of new setsof aligned teeth to sharpening positions. f

5. ln a saiv sharpener,- the combination with a base, of a carriagerec-iprocably sup*- ported on said base. a cutting tool holder carriedby said base and reeiprocably mounted/to move in a direction transverseto the movement of said base, a vise. and means operated by the movementof the cutting tool into engagement with the teeth of the savv toroperating said vise to grip the saw.

6. In a saw Sharpener, the combination with a base, ot' a carriagereciprocably mounted on said base, a cutting tool holder mounted on saidbase to reciprocate in a direction substantially transverse to themovement of the carriage, means for removably securing a cutting tool onsaid carriage, a vise, and means operated by the movement ot saidcarriage for operating` said vise to grip the saw in sharpeningposition.

T. In a savv Sharpener, the combination with a base, ot a carriagereciprocably mounted on said hase, a sharpening tool holder carried bysaid base and comprising a relatively stationary member adjustablymounted on said base, and a tool holding member reciprocably mounted onsaid relatively stationary member and operating in Aa direct-ionsubstantially transverse to the movement of the carriage, a vise, andmeans operated hy the movement ot said carriage tor operating said viseto cause it to grip the saw and hold the same in Sharpening position.

In a san' sharpener, the combination with a base, of a reciprocatingsharpening tool holder, a vise and means for simultaneously moving saidtool supported by said holder substantially at right angles to the lineot' cut and into engagement with the saw teeth and operating said visetor grippingthe saiv.

it). In a saw Sharpener, the combination with a base, otl a vise mountedthereon for holding a savv, a carriage reciprocably mounted on saidbase, a tool holder guide mounted on said carriage and movabletherewith, a tool holder reciprocably mounted on said guide and having avertical movement thereon, and means operated by said carriage formoving the tool ot' said holder substantially at right angles to theline of cut and into engagement With the savv in said vise andsimultaneously operating said visel to cause it to grip the saiv.

10. The method of sharpening a band saw which consists in first loopingthe sav to vlorm three substantially circular loops with the teeth otthe saw all arranged on the same side. holding a portion ot said loopsin suhstantially rigid position adjacent one another and with the teethin alignment and simultaneously removing a portion of the metal ot thealigned teeth.

ll. The method ot sharpening a band saw which consists in first loopingthe saw to torm three substantially circular loops with ythe teeth ot'the savv all arranged on the same side, holding a portion ot' said loopsin substantially rigid position adjacent one; another and with the teethin alignment and removing a portion ot' the met-al of the aligned teethsimultaneously, then advancing the loops a step to present a new set ofteeth removing a portion ot' the meta-l 'from' said teeth andcontinuing` alternate steps of Sharpening a roiv ot teeth and advancingthe loops to presenta new set ot teeth.

l2. In a saw Sharpener the combination with a base, ot areciprocatingsharpening tool holder, a vise in which the saw is arrangedto be held, the teeth ot the saw being arranged to be engaged by thetool in said holder to ad tance the saw step by step into operativeposition, and means operating with the movement. of said tool holder inadvancing the saw tor clamping the vise upon said saw.

13. In a saw Sharpener the combination with a base, ot' a sharpeningtool holder reci procable to permit the tool held thereby to be operatedfor cutting purposes, said tool holder having a reciprocal movementsubstantially t'ansverse to said tirst reciprocal movement to permit'the tool held thereby to engage the teeth ot the saw to advance the samestep by step into cutting position,l

a vise and means operating with said second mentioned movement ot thetool holder for operating said vise to alternately engage and releasethe saw.

14. In a saw sharpener the combination with a reciprocable carriage, ot'a tool holder mounted on said carriage and reciprocable transverselythereof, a tool mounted in said holder, a. vise for supporting the saivin position to be. operated on by the tool, the tool being arranged toengage the teeth ot the saw and advance the same step by step by theadvance and reciprocal movement ot the carriage and means whereby theadvance and reciprocal movement of the carriage will alternately operatethe vise to grip the saw and release the same.

l5. In a saw Sharpener the combination with a reciproca-ble carriage, ota sharpening tool holder mounted on said carriage and reciprocablesubstantially transversely to the line of movement thereof, a vise inWhich the saw is adapted to be held to be operated upon by saidsharpening tool and means operated by the first mentioned reciprocalmovement of said carriage -tor causing said vise to be operatedalternately to grip and release the saw.

In witness whereof, I have hereunto set my hand at Indianapolis,Indiana, this 3rd day of May, Ai. D. one thousand nine hundred andtwenty two.

IVILLIAM H. KRAMER.

